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经营范围
发明名称
EARTH BORING TOOL
摘要
申请公布号
US3536151(A)
申请公布日期
1970.10.27
申请号
USD3536151
申请日期
1968.10.21
申请人
BRITE LITE ENTERPRISES INC.
发明人
CARL P. AARUP
分类号
E21B7/04;E21B7/18;(IPC1-7):E21B7/18;E21C19/00
主分类号
E21B7/04
代理机构
代理人
主权项
地址
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